package com.platform.utils;

import com.platform.entity.SysUserEntity;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;

/**
 * Shiro工具类
 *
 * @author lipengjun
 * @email 939961241@qq.com
 * @date 2016年11月12日 上午9:49:19
 */
public class ShiroUtils {

  public static Session getSession() {
    return SecurityUtils.getSubject().getSession();
  }

  public static Subject getSubject() {
    return SecurityUtils.getSubject();
  }

  public static SysUserEntity getUserEntity() {
    return (SysUserEntity) SecurityUtils.getSubject().getPrincipal();
  }

  public static Long getUserId() {
    return getUserEntity().getUserId();
  }

  public static void setSessionAttribute(Object key, Object value) {
    getSession().setAttribute(key, value);
  }

  public static Object getSessionAttribute(Object key) {
    return getSession().getAttribute(key);
  }

  public static boolean isLogin() {
    return SecurityUtils.getSubject().getPrincipal() != null;
  }

  public static void logout() {
    SecurityUtils.getSubject().logout();
  }

  public static String getKaptcha(String key) {
    String kaptcha;
    try {
      kaptcha = getSessionAttribute(key).toString();
      getSession().removeAttribute(key);
    } catch (Exception e) {
      return null;
    }
    return kaptcha;
  }

}
